Since we launched InsideWork 3.0 on June 30, we’ve been giving away cool stuff to folks who find the hidden doors here and there around the site.

There are no more new doors, but the giving isn’t yet complete.

Each person who located a hidden door, whether or not he or she collected the prize behind that door, became eligible for the Grand Prize drawing on September 5, 2008.

We’re leaving the doors open through September 4, 2008, so if you come across a hidden door before then, you can still qualify for the Grand Prize drawing (in fact, there are still some unclaimed prizes — apparently hidden a little too well — so, who knows, you might yet win a prize and then win the Grand Prize).

And the Grand Prize, you have no doubt surmised, is an iPhone 3G from Apple (since the iPhone requires onsite activation, what we’ll actually send the winner is a certificate that can be redeemed at any Apple Store — walk in with the certificate, activate the plan that suits your budget, walk out with the iPhone.

So… browse around the site, keep your eyes open for the hidden doors , and get your chance at an iPhone 3G courtesy of InsideWork. And, while you’re at it, why not invite a friend or two to see what they can see…